Heat accumulator



March 19, 1929- -io ug 1,705,975

' HEAT ACCUMULATOR Filed Dec. 15, 1924 lnvenfbr:

Patented Mar. l9, 1929.

VUNITED' STATES PATENT OFFICE.

GOTTLIEB HOLTI-IAUS, OF DUIS BURG-RUHRORT, GERMANY, ASSIGNOR TO SIEMENS- SCI-IUOKERTWERKE A. (1., OF BERLIN-SIEMENSSTADT, GERMANY.

HEAT ACGUMULATOR.

Application filed. December 15, 1924, Serial No. 756,162, and in Germany February 5, 1 924.

In establishments where a blast furnace is run conjointly with a coke producing plant and with steel works and rolling mills, and where the power for the latter is derived from the waste gases of the coke oven and of the blast furnace, Sundays and holidays bring with them the disadvantage that, owing to the stoppage of the steel work and the rolling mills, the gases cannot on these 10 days be fully utilized. The acquisition of gasometers in which the gas may be stored for later use would lead to expenses whlch could not be covered by the saving of the as. h The object of the present invention is to provide inexpensive means whereby the en-;

ergy of this gas may be fully utilized, and the invention consists in the provision of a steam accumulator in the form of a pipe coil. embedded in concrete. in a thick-walled shell and adapted to hold steam at a pressure of over 225 atmospheres and of a tem-- perature of over 374 (1., any waste gases available for the purpose being utilized in generatingand accumulating the steam.

It is well known that steam havinga pressure of over 225 atmospheres can be stored without risk, since steam and water enclosed together in a receptacle under this pres 40 resents a diagrammatic view of a plan according to the invention,

F 2 is a vertical section of the steam accumulator, and

Fig. 3, a horizontal section of the same. Fig. 4 is a sectional view of the high-pressure steam boiler.

The water for cooling the gas engine a is forced by means 01": apump n with a pressure of about 510 atmospheres through the ra- Another pump 0 delivers the water, under I a pressure of over .225 atmospheres, into a high-pressure boiler al which is heated by the exhaust gases from the engine a, it being connected to the latter by a pipe 6. This boiler converts the water into steam of a pressure of over 225 atmospheres and of corresponding temperature. The steam passes through a pipe f into a vessel 9 which is built so as to withstand the pressure and which accumulates the waste energy of the engine in the form of saturated or superheated steam of a pressure of over 225 atmospheres. Thesteam, controlled by a cock h, is utilized for driving a steam turbine 2' which in its turn drives a dynamo is. The water collected in the condenser Z of the turbine is led through the pipe m to the pump a and is again used for cooling the engine lVhen, during Sundays and holidays, the gas engine is not in use, the blast furnace gas which ordinarily would be used for driving the engine, is led through a pipe 0 to a burner which may be situated at p for heating the boiler d.

The steam accumulator g is composed of an outer, thick-walled shell gin which a pipe coil 9", made in one piece and strong enough to resist the pressure, is accommodated. The shell g is filled in with concrete .9 or the like so as to protect the coil from external heat exchange and so as to form a bed in which the coil is supported on all sides and relieved of stress other than that caused by the pressure. The steam enters the coil at t and leaves it at u.

Fig. 4% shows the construction of the highpressure steam boiler which has the form of an ordinary feed water heater though very much stronger. The steam pipes *0, which must be capable of withstanding a pressure of over 225 atmospheres at a temperature of at least 500 (3., pass through the heating space to from one to another of two spherical chambers 00 and m which are preferably arranged outside the boiler shell. The gases from the engine a or from the burner 17 are delivered into the space to by the plpe e at the top of the boiler shell and leave the space I claim: through a pipe 2 at the bottom of the shell. A steam storer 01' accumulator comprising The Water or steam passes in the opposite a thick-Walled shell filled with concrete, and 10 7 direction, it being fed at 3 into the chama pipe coil embedded in the concrete so as 5 her and discharged at 1 from the chamto be supported thereby and protected from ber 012 The upper chamber 00 and the pipe f external heat interchange must be Well insulated against loss of heat. GOTTLIEB HOLTHAUS. 

